CN102405662B - Method, system and mobile switch center for legal listening - Google Patents
Method, system and mobile switch center for legal listening Download PDFInfo
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- CN102405662B CN102405662B CN200980117319.XA CN200980117319A CN102405662B CN 102405662 B CN102405662 B CN 102405662B CN 200980117319 A CN200980117319 A CN 200980117319A CN 102405662 B CN102405662 B CN 102405662B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/30—Network architectures or network communication protocols for network security for supporting lawful interception, monitoring or retaining of communications or communication related information
- H04L63/304—Network architectures or network communication protocols for network security for supporting lawful interception, monitoring or retaining of communications or communication related information intercepting circuit switched data communications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/80—Arrangements enabling lawful interception [LI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/10—Reselecting an access point controller
Abstract
Provided are a method, a system and a mobile switch center (MSC) for legal listening, wherein, the method for legal listening includes that: when a local switch of a speech path between a first terminal and a second terminal is built in Base Station Sub-system (BSS), or after the local switch of a speech path between the first terminal and the second terminal is built in BBS, BBS is notified to output by-pass channel to MSC to perform legal listening about the speech path. The method, the system and MSC in the invention can realize leading-out the by-pass channel to perform legal listening by connecting the speech path between the first terminal and the second terminal from BBS to MSC.
Description
Technical field
The present invention relates to mobile communication technology field, particularly a kind of method of Lawful Interception, system and mobile switching centre.
Background technology
In existing communication system, generally by core net (Core Network, be called for short CN) in (the Mobile Switch Center of mobile switching centre, be called for short MSC) the continuing of speech channel that complete two communication terminals of a session, call out and will set up the user's face link and the chain of command link that arrive MSC from terminal through base station sub-system (Base Station Sub-system is called for short BSS).Above-mentioned transmission network is an important component part in a mobile communications network, particularly global system for mobile communications (Global System for Mobile communication is called for short GSM) network.
The operator of at present a lot of countries and regions is because connect the bottleneck problem of the transfer resource of wireless access network (mainly comprising BSS) and core net, and the deployment, operation and the business that have affected wireless network are carried out.In above-mentioned scene, the method that operator generally can adopt microwave, satellite or rent terrestrial transmission circuit solves the bottleneck problem of transfer resource, adopt rational technical scheme can reduce the taking of transmission network bandwidth, can help operator to effectively reduce wireless network construction and operation cost.Wherein, the local exchange of carrying out user's face link in BSS is exactly a kind of method that transfer resource takies that effectively reduces, and the speech channel that this local exchange that carry out in BSS is two communication terminals is at BSS inloop.The basic scheme of this local exchange is exactly that the MSC that the chain of command link of calling is still connected in CN controls, and meanwhile, user's face link of calling is directly carried out to loopback in BSS inside.
Lawful Interception refers in law allowed band, the activity of state security department's monitoring telecommunication service.Any monitoring activity all should obtain the mandate of national correlation department.According to the requirement of state security department, the mobile communications network of all operations, comprise GSM, code division multiple address communication system (Code Division Multiple Access, be called for short CDMA) and following Wideband Code Division Multiple Access (WCDMA) communication system (the Wide Code Division Multiple Access, be called for short W-CDMA) etc., must make state security department monitor target UE, and the monitoring interface of realizing monitoring is provided.The monitoring system of state security department, by monitoring interface accessing mobile communication network, realizes the monitoring to target UE, and wherein target UE refers to monitored communication terminal.
In existing monitoring technique standard, the business of practicable monitoring has: call business, facsimile service, asynchronous data traffic, short message service and supplementary service etc.In GSM and cdma communication network, requirement provides the equipment of monitoring access function to comprise: attaching position register (HLR, Home Location Register), (MSC of mobile switching centre, Mobile Switch Center) and short message service center (SMC, Short Message Center).For call business, the monitoring of the speech channel of all-calls all offers monitoring system by MSC.
But, carry out the local exchange of user's face link in BSS time, speech channel without MSC, therefore the local exchange in BSS cannot be implemented with legal monitoring business simultaneously.
Summary of the invention
The embodiment of the present invention provides a kind of method, system and mobile switching centre of Lawful Interception, to realize the Lawful Interception to terminal room speech channel.
The embodiment of the present invention provides a kind of method of Lawful Interception, comprising:
Set up the local exchange of first terminal and the second terminal room speech channel in base station sub-system BSS in or set up in BSS after the local exchange of first terminal and the second terminal room speech channel, notify described BSS output to switch on moving exchanging center MSC for the Lawful Interception of carrying out speech channel.
The embodiment of the present invention also provides a kind of moving exchanging center MSC for Lawful Interception, described MSC, for set up the local exchange of first terminal and the second terminal room speech channel in base station sub-system BSS in or set up in BSS after the local exchange of first terminal and the second terminal room speech channel, notifies described BSS output to switch on moving exchanging center MSC for the Lawful Interception of carrying out speech channel.
The embodiment of the present invention also provides a kind of system of Lawful Interception, comprising: moving exchanging center MSC, base station sub-system BSS and monitoring system, wherein
Described MSC, for set up the local exchange of first terminal and the second terminal room speech channel in base station sub-system BSS in or set up in BSS after the local exchange of first terminal and the second terminal room speech channel, notify described BSS output to switch on moving exchanging center MSC;
Described BSS, for carrying out bypass operation, output switches to described MSC, is routed on described MSC with the speech channel that described terminal room is set up;
Described MSC is also for drawing speech to described monitoring system from the bypass being routed to described MSC;
Described monitoring system, carries out the Lawful Interception to speech channel for the speech by drawing from described MSC.
From above technical scheme, method, system and the mobile switching centre of the Lawful Interception of the embodiment of the present invention, by two terminal room speech channels being routed to MSC from BSS, thereby can realize and draw bypass from MSC and carry out Lawful Interception for monitoring system, the method can not cause the voice interruption in two terminal room speech channels of having set up local exchange maybe can make the time of voice interruption greatly shorten, and makes listened person be not easy to perceive its speech channel monitored.
Brief description of the drawings
Fig. 1 is the schematic network structure that user's face link of the present invention is realized Lawful Interception when the built-in grade separation of MSC changes;
Fig. 2 is that user's face link of the present invention is set up the schematic network structure that can not realize Lawful Interception after local exchange in BSS;
Fig. 3 is the signaling process figure of method one embodiment of Lawful Interception of the present invention;
Fig. 4 is the speech channel schematic diagram of method one embodiment of Lawful Interception of the present invention;
Fig. 5 A is the signaling process figure of another embodiment of method of Lawful Interception of the present invention;
Fig. 5 B is another signaling process figure of another embodiment of method of Lawful Interception of the present invention;
Fig. 6 is the method signaling process figure of an embodiment again of Lawful Interception of the present invention;
Fig. 7 is the signaling process figure of the another embodiment of method of Lawful Interception of the present invention;
Fig. 8 is the structural representation of the present invention for MSC mono-embodiment of Lawful Interception;
Fig. 9 is the structural representation of the present invention for another embodiment of MSC of Lawful Interception;
Figure 10 is the MSC again structural representation of an embodiment of the present invention for Lawful Interception;
Figure 11 is the structural representation of the present invention for the another embodiment of MSC of Lawful Interception;
Figure 12 is the structural representation of the present invention for the another embodiment of MSC of Lawful Interception;
Figure 13 is the structural representation of the system embodiment of Lawful Interception of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the schematic network structure that user's face link of the present invention is realized Lawful Interception when the built-in grade separation of MSC changes.As shown in Figure 1, the i.e. speech channel between two terminal MS 1 and MS2 of user's face link be connected to MSC and in MSC loopback, as long as draw and switch to monitoring system from MSC, can realize the Lawful Interception to some terminals or two terminals.Fig. 2 is that user's face link of the present invention is set up the schematic network structure that can not realize Lawful Interception after local exchange in BSS.As shown in Figure 2, loopback is carried out in the i.e. speech channel between two terminal MS 1 and MS2 of user's face link in BSS; This BSS mainly comprises BSC and BTS, loopback in this BSS can be that loopback is carried out in the speech channel of two terminal rooms in same BSC in BSC, also can be same BTS (bunch) in two terminal rooms speech channel BTS (bunch) in carry out loopback, the scene shown in Fig. 2 for carrying out loopback in BSC.In the local exchange described in Fig. 2, the speech channel between two terminal MS 1 and MS2 does not need to be connected to MSC, has saved the resource of the A interface between BSS and MSC, but now cannot set up the link of the Lawful Interception of drawing from MSC.Following embodiment of the present invention carries out under the scene of local exchange specifically introducing two terminals in BSS, how to carry out the technical scheme of the Lawful Interception to terminal room speech channel.The local exchange that it should be noted that the terminal room speech channel of setting up in the BSS that the embodiment of the present invention mentions does not distinguish the local exchange in local exchange or BTS in BSC.
The technical scheme that the embodiment of the present invention adopts be in BSS, set up the local exchange of terminal room speech channel in or in BSS, set up after the local exchange of terminal room speech channel, notice BSS output switches to the upper Lawful Interception for carrying out the speech channel to terminal room of MSC; Also can in base station sub-system BSS, set up after the local exchange of terminal room speech channel, remove this local exchange, and be the speech channel between terminal foundation and MSC, this speech channel is drawn bypass as the output of speech channel being carried out to Lawful Interception via MSC loopback and from MSC.
Wherein, with reference to figure 1 and Fig. 2, in BSS, set up after the local exchange of terminal room speech channel, remove this local exchange, and be the speech channel between terminal foundation and MSC, this speech channel is via MSC loopback and draw bypass from MSC and be specially as the scheme of speech channel being carried out to the output of Lawful Interception: MSC notice BSS removes the local exchange of the speech channel of two terminal rooms, set up the user face link connection of two terminals on A interface to MSC, make the speech channel of two terminal rooms be connected to MSC and loopback in MSC, thereby can draw bypass as the output of speech channel being carried out to Lawful Interception from MSC, the Lawful Interception of the speech channel for monitoring system to terminal room.After this, if desired stop the Lawful Interception of the speech channel of monitoring system to terminal room, can directly be carried out by MSC, cancel and export the bypass of monitoring system to by MSC, and without the assistance of BSS.
Fig. 3 is the signaling process figure of method one embodiment of Lawful Interception of the present invention.This embodiment realizes under following scene: two terminals in same session are that the speech channel between first terminal and the second terminal has been set up local exchange in this BSS.As shown in Figure 3, comprise the steps:
Fig. 4 is the speech channel schematic diagram of method one embodiment of Lawful Interception of the present invention.As shown in Figure 4, monitoring system can require to monitor a terminal MS 1 to the speech channel of another terminal MS 2 or require to monitor MS2 and all require to monitor to the speech channel of MS1 or the speech channel of both direction, now, MSC sends one of two speech channels of two terminal rooms to having set up local exchange or two speech channels and carries out ordering to BSS of bypass operation;
BSS switches to going out of the speech channel of two terminal rooms MSC and has returned to bypass operation to output and acknowledges message to MSC, and MSC can get the speech that two terminal rooms are conversed;
What step 303, MSC received that BSS returns completes bypass operation response message, draws for monitoring system and carries out the Lawful Interception to speech channel being routed to bypass on MSC.
The method of the Lawful Interception that the present embodiment provides, by the speech channel bypass of two terminal rooms being outputed to MSC from BSS, thereby can realize and draw speech from MSC and carry out Lawful Interception for monitoring system, the method can not cause the voice interruption in the speech channel of two terminal rooms having set up local exchange maybe can make the time of voice interruption greatly shorten, and makes listened person be not easy to perceive its speech channel monitored.
In addition, in the process maintaining in local exchange, for carrying out bypass operation by BSS, speech channel bypass is outputed on MSC, and by MSC, speech is outputed to monitoring system and carry out Lawful Interception, in the time that monitoring system no longer needs to proceed Lawful Interception, MSC can notify the bypass output of BSS terminating terminal speech, BSS discharges the speech channel of two terminals to the bypass output of MSC,, if will stop Lawful Interception, after step 303, can also comprise as shown in Figure 3:
This release is routed to the flow process of the bypass of MSC and has set up bypass and all can apply in the speech channel of two terminal rooms being routed to the embodiment of MSC following, realizing the terminating operation to Lawful Interception.
In the embodiment of the present invention, MSC chains transmission to the message between BSS at the relevant dedicated signaling connection control protocol of calling (Signalling Connection Control Part is called for short SCCP).
Fig. 5 A is the signaling process figure of another embodiment of method of Lawful Interception of the present invention.This embodiment realizes under following scene: the calling between two terminals in same session is in same BSS and coding is consistent or coding is compatible, and speech channel between these two terminals can be set up local exchange but also not set up in this BSS.As shown in Figure 5A, comprise the steps:
In the call establishment of two terminals, MSC judges that calling party's terminal and callee's terminal can set up local exchange, receives after the connection request message that callee's terminal sends, and sends the order of the local exchange of setting up two terminal rooms to BSS;
In the order of this execution bypass operation, carrying alternatively MSC is the endpoint resources information that bypass is prepared;
This completes and carries alternatively BSS in bypass operation response message is the endpoint resources information that bypass distributes;
What step 505, MSC received that BSS returns completes bypass operation response message, draws for monitoring system and carries out the Lawful Interception to speech channel being routed to bypass on MSC.
In this step 505, MSC receives completing after bypass operation response message that BSS returns, can send callee to calling party's terminal and be sent to the connection request message on MSC; Calling party's terminal receives after this connection request message, returns to connection response message to MSC; The connection response message that calling party's terminal that MSC is received sends is sent to callee's terminal.So far complete the call establishment of two terminals, completed the bypass operation of for monitoring system, speech channel being carried out Lawful Interception simultaneously.
The signaling message that the realization flow of the Lawful Interception described in above-mentioned steps 501～step 505 is set up local exchange sends respectively from the signaling message of bypass operation in different message, and signaling process described below can be placed on the signaling message of the signaling message of the foundation of local exchange and bypass operation in same message and send.Fig. 5 B is another signaling process figure of another embodiment of method of Lawful Interception of the present invention.As shown in Figure 5 B, specifically comprise the steps:
Step 501 ', MSC sends and sets up the local exchange of first terminal and the second terminal room speech channel and speech channel in local exchange is carried out to ordering to BSS of bypass operation;
In the order of this execution bypass operation, carrying alternatively MSC is the endpoint resources information that bypass is prepared;
In the call establishment of two terminals, MSC judges that calling party's terminal and callee's terminal can set up local exchange, receive after the connection request message of callee's terminal transmission, send the order of setting up the local exchange of two terminal rooms and the speech channel in local exchange being carried out to bypass operation to BSS;
Step 502 ', BSS completes the foundation of local exchange and the speech channel output of built vertical local exchange switched to MSC, returned to local exchange and bypass operation response message to MSC;
This completes and carries alternatively BSS in local exchange and bypass operation response message is the endpoint resources information that bypass distributes;
Step 503 ', MSC receive that BSS returns complete local exchange and bypass operation response message, draw for monitoring system and carry out the Lawful Interception to speech channel being routed to bypass on MSC.
This step 503 ' in, MSC receives completing after local exchange and bypass operation response message that BSS returns, can send callee to calling party's terminal and be sent to the connection request message on MSC; Calling party's terminal receives after this connection request message, returns to connection response message to MSC; The connection response message that calling party's terminal that MSC is received sends is sent to callee's terminal.So far complete the call establishment of two terminals, completed the bypass operation of for monitoring system, speech channel being carried out Lawful Interception simultaneously.
The message of setting up local exchange and bypass operation in the present embodiment may be incorporated in a piece of news and issues, also can be divided into two message and be sent to respectively BSS, be incorporated in and in a piece of news, issue the time delays that can save operation, accelerate Lawful Interception and set up, make listened person more be not easy to perceive speech channel and interrupt.
After if first terminal switches can with BSS in the second terminal set up local exchange, specifically described scheme in above-described embodiment: set up the local exchange of first terminal and the second terminal room speech channel in BSS in or set up in BSS after the local exchange of first terminal and the second terminal room speech channel, notice BSS output switches to that MSC is upper specifically comprises following several mode for carrying out to the Lawful Interception of speech channel:
First kind of way: after first terminal switches, in MSC sets up the local exchange of first terminal and the second terminal room speech channel in BSS, notice BSS output switches to the upper Lawful Interception for carrying out speech channel of MSC.
Under which, between MSC and BSS, first carry out the processing of handover-related message, then in the processing of carrying out local exchange related news, carry out the processing of bypass operation related news.
The second way: in the process that first terminal switches, in MSC sets up the local exchange of first terminal and the second terminal room speech channel in BSS, notice BSS output switches to the upper Lawful Interception for carrying out speech channel of MSC.
Under which, between MSC and BSS, the related news of switching, local exchange and bypass operation are combined and processed.
The third mode: after first terminal switches, first set up the local exchange of first terminal and the second terminal room speech channel by MSC in BSS, then switch to the upper Lawful Interception for carrying out speech channel of MSC by MSC notice BSS output.
Under which, between MSC and BSS, first carry out the processing of handover-related message, then carry out the processing of local exchange related news, finally carry out the processing of bypass operation related news, the related news of each processing are all independently.
The 4th kind of mode: in the process that first terminal switches, first set up the local exchange of first terminal and the second terminal room speech channel by MSC in BSS, then switch to the upper Lawful Interception for carrying out speech channel of MSC by MSC notice BSS output.
Under which, between MSC and BSS, the related news of switching and local exchange are combined and processed, then carry out the processing of bypass operation related news.
Fig. 6 is the method signaling process figure of an embodiment again of Lawful Interception of the present invention.This embodiment realizes under following scene: first terminal carries out switching between BSS, be that first terminal can be set up local exchange with the second terminal in BSS from another BSS is switched to BSS, now first terminal and the second terminal all in BSS, and meet the condition of the local exchange in BSS between the two.Under this scene, as shown in Figure 6, with the above-mentioned second way---in the process that first terminal switches, in MSC sets up the local exchange of first terminal and the second terminal room speech channel in BSS, notice BSS output switch to MSC upper for carry out to speech channel Lawful Interception---be example, the method for this Lawful Interception specifically comprises the steps:
In described handover request message, also carrying alternatively MSC is the endpoint resources information that bypass is prepared; MSC receives handoff requirement message, and receive monitoring system and will carry out to one of two speech channels between first terminal and the second terminal or two speech channels the request of Lawful Interception, can send and carry the local exchange of the speech channel of setting up first terminal and the second terminal room and the handover request message that notice BSS carries out the instruction of bypass operation to BSS;
In this handover request ack message, also carrying alternatively BSS is the endpoint resources information that bypass is prepared;
In this handoff completion message, also carrying alternatively BSS is the endpoint resources information of bypass amendment;
In addition, under scene described in the present embodiment, if realize, the speech channel of first terminal and the second terminal room is carried out to Lawful Interception, MSC also can conclusive judgement described in the calling of first terminal and the calling of the second terminal do not set up local exchange, and notify BSS that the speech channel of first terminal and the second terminal room is directly connected to MSC, carry out loopback by MSC, carry out Lawful Interception thereby draw bypass to monitoring system by MSC.
The method of the Lawful Interception of the present embodiment, carry out switching between BSS at first terminal, and switched to after BSS by another BSS, set up after speech channel at this first terminal and the second terminal in BSS, can adopt four kinds of above-mentioned modes to monitor the speech channel of two terminals.The method can not cause the voice interruption of the speech channel of two terminals setting up local exchange maybe can make the time of interrupting greatly shorten, and makes listened person be not easy to perceive its speech channel monitored.
In addition, if by the first terminal that carries out session and set up local exchange with the second terminal in BSS from BSS is switched to another BSS, and reside in the discontented sufficient local exchange set up the condition of the second terminal in BSS, can also comprise the steps:
Step 601 ', in the time carrying out the switching of first terminal from BSS to another BSS, MSC notice BSS removes local exchange;
Step 602 ', BSS removes the bypass of setting up when speech channel is routed to described MSC of cancelling first terminal and the second terminal when local exchange, and the speech channel of the second terminal in BSS is connected directly to MSC;
Step 603 ', the speech channel that switches to first terminal wherein also reconnects to MSC by another BSS.
Particularly, MSC receives after the handoff requirement message of BSS transmission, determine that switching the first terminal and the second terminal still residing in BSS from BSS can not continue to maintain local exchange, the user's face link that is first terminal and the second terminal must carry out loopback after switching on MSC, and MSC can initiate the operation of the local exchange of above-mentioned releasing first terminal and the second terminal room.For first terminal, the speech channel of having set up local exchange in BSS be removed, in another BSS, re-establish the speech channel of MSC; For the second terminal in BSS still, only need to cancel bypass, and the speech channel of local exchange is directly continued to MSC.
By above-mentioned steps 601 '～step 603 ', can re-establish the speech channel of two terminals to MSC, make the speech channel of two terminals can be in MSC loopback, thereby if monitoring system need to be carried out Lawful Interception to terminal, can directly draw speech for Lawful Interception by MSC.
Fig. 7 is the signaling process figure of the another embodiment of method of Lawful Interception of the present invention.This embodiment realizes under following scene: first terminal switches in the BSS at the second terminal place, and can set up local exchange with the second terminal coexisting in BSS, switching in this BSS may switch to another BTS in same BSS from a BTS for first terminal, the embodiment of the present invention is not distinguished, and is referred to as in BSS and switches.Under this scene, as shown in Figure 7, with the above-mentioned second way---in the process that first terminal switches, in MSC sets up the local exchange of first terminal and the second terminal room speech channel in BSS, notice BSS output switch to MSC upper for carry out to speech channel Lawful Interception---be example, the method for this Lawful Interception specifically comprises the steps:
This step 701 is optional step.
In this inside switching command, also carrying alternatively MSC is the endpoint resources information that bypass is prepared;
This switching completes and also carries alternatively BSS in response message is the endpoint resources information that bypass distributes.
In addition, under scene described in the present embodiment, if realize, the speech channel of first terminal and the second terminal room is carried out to Lawful Interception, MSC also can conclusive judgement described in the calling of first terminal and the calling of the second terminal do not set up local exchange, be that MSC does not carry the local exchange of the speech channel of setting up first terminal and the second terminal room and notifies described BSS to carry out the instruction of bypass operation in the inside switching command of BSS transmission, after switching, still speech channel is carried out to loopback at MSC, monitor thereby draw bypass by MSC.
The method of the Lawful Interception of the present embodiment is switched in first terminal carries out BSS, and sets up after speech channel at this first terminal with in the second terminal, can adopt four kinds of above-mentioned modes to monitor the speech channel of two terminals.The method can not cause the voice interruption of the speech channel of two terminals setting up local exchange maybe can make the time of interrupting greatly shorten, and makes listened person be not easy to perceive its speech channel monitored.
In addition, if after the first terminal that carries out session with the second terminal and set up local exchange in BSS is carried out switching in BSS, no longer meet local exchange set up the condition with described the second terminal coexisting in BSS, can also comprise the steps:
Step 701 ', while carrying out the switching of first terminal in BSS, MSC notifies BSS to remove local exchange in inner switching command;
Step 702 ', BSS removes and cancels the bypass that first terminal and the second terminal room are set up when speech channel is routed to described MSC when local exchange, and the speech channel of the second terminal in BSS is connected to MSC;
Step 703 ', the speech channel of carrying out the first terminal switching in BSS is connected to MSC by BSS.
Particularly, MSC receives after the inside handover request message of BSS transmission, determine that first terminal and the local exchange of the second terminal in BSS can not continue to maintain, the user's face link that is first terminal and the second terminal must carry out loopback after switching on MSC, and MSC can initiate the operation of the local exchange of above-mentioned releasing first terminal and the second terminal room.
By above-mentioned steps 701 '～step 703 ', can re-establish the speech channel of two terminals to MSC, make speech channel loopback in MSC of two terminals, thereby if monitoring system need to be carried out Lawful Interception to terminal, can directly draw speech for Lawful Interception by MSC.
Fig. 8 is the structural representation of the present invention for MSC mono-embodiment of Lawful Interception.As shown in Figure 8, this MSC8 in setting up the local exchange of first terminal and the second terminal room speech channel or set up in BSS9 after the local exchange of first terminal and the second terminal room speech channel in BSS9, and notice BSS9 output switches to the upper Lawful Interception for carrying out speech channel of MSC8.Wherein this MSC8 specifically can comprise: the first sending module 81, the first receiver module 82 and processing module 83.Wherein, the first sending module 81 is for sending the order of setting up the local exchange order of first terminal and the second terminal room speech channel and/or the speech channel of local exchange being carried out to bypass operation to BSS9; The first receiver module 82 completes the foundation of local exchange and/or the speech channel output of built vertical local exchange is switched to corresponding the completing local exchange response message and/or complete bypass operation response message of returning after MSC8 for receiving BSS9; Processing module 83, for receiving BSS returns complete local exchange and bypass operation response message or complete after bypass operation response message, is drawn the bypass being routed on MSC for the Lawful Interception of carrying out speech channel.
In addition, this MSC8 can also comprise: the second sending module 84 and the second receiver module 85.Wherein, the second sending module 84 is for sending and discharge bypass operation order to BSS9; The second receiver module 85 is for receiving BSS9 according to discharging bypass operation order by the bypass Release complete returning after the bypass release being routed on MSC8.
In the MSC that the present embodiment provides in the first sending module and the first receiver module the message of institute's sending and receiving can be respectively in different message chronologically relation send, also can be to be incorporated in same message to send simultaneously, its concrete scheme is described described in the embodiment of the method that refers to above-mentioned Lawful Interception, does not repeat them here.
The MSC that the present embodiment provides, pass through bypass operation, from BSS, the speech channel of two terminal rooms is routed to MSC, thereby can realize and draw bypass from MSC and carry out Lawful Interception for monitoring system, the method can not cause the voice interruption in the speech channel of two terminal rooms having set up local exchange maybe can make the time of voice interruption greatly shorten, and makes listened person be not easy to perceive its speech channel monitored.
Fig. 9 is the structural representation of the present invention for another embodiment of MSC of Lawful Interception.As shown in Figure 9, if when first terminal is switched to BSS92 from another BSS91 can with BSS92 in the second terminal set up local exchange, MSC8 specifically can comprise: the 3rd receiver module 81 ', select judge module 82 ' and the 3rd sending module 83 '.Wherein the 3rd receiver module 81 ' for receiving the handoff requirement message of another BSS91 transmission, first terminal is cut off another BSS91 by request MSC8; Receive the handover request ack message that BSS92 returns, in this handover request ack message, carry the local exchange of the speech channel of setting up first terminal and the second terminal room and notify BSS92 to carry out the response of the instruction of bypass operation; Receive BSS92 and complete the handoff completion message returning after the foundation of switching, local exchange of described first terminal and bypass operation, in this handoff completion message, carry the result of setting up result and bypass operation of local exchange; Selection judge module 82 ' for selecting first terminal will switch the Target cell entering from the cell list of handoff requirement message, judge Target cell and belong to BSS92 and judge first terminal and the second terminal room speech channel meets local exchange set up the condition, and determine whether described first terminal and the second terminal need to set up local exchange and bypass output; The 3rd sending module 83 ' set up the local exchange of first terminal and the second terminal room speech channel and notify BSS92 to carry out the instruction of bypass operation for sending handover request message to BSS92, carrying in this handover request message; Send switching command to another BSS91.
The technical scheme that realizes the Lawful Interception of monitoring system to terminal when first terminal can be set up local exchange with the second terminal in BSS from another BSS is switched to BSS has been described in the MSC that the present embodiment provides, the operation of switching, local exchange and bypass can be respectively in different message chronologically relation send, also can be to be incorporated in same message to send simultaneously, its concrete scheme is described described in the embodiment of the method that refers to above-mentioned Lawful Interception, does not repeat them here.
The MSC that the present embodiment provides, pass through bypass operation, from BSS, the speech channel of two terminal rooms is routed to MSC, thereby can realize and draw bypass from MSC and carry out Lawful Interception for monitoring system, the method can not cause the voice interruption in the speech channel of two terminal rooms having set up local exchange maybe can make the time of voice interruption greatly shorten, and makes listened person be not easy to perceive its speech channel monitored.
Figure 10 is the MSC again structural representation of an embodiment of the present invention for Lawful Interception.As shown in figure 10, if when first terminal switches in the BSS93 at the second terminal place can with BSS93 in the second terminal set up local exchange, this MSC8 specifically can comprise: the 4th receiver module 81 " and the 4th sending module 82 ".Wherein the 4th receiver module 81 " the inside handover request message sending for receiving BSS93; Receive BSS93 and complete the switching of returning after the foundation of switching, local exchange of first terminal and bypass operation and complete response message, this switching completes the result of setting up result and bypass operation that carries local exchange in response message; After the inside handover request message that the 4th sending module 82 " for receiving the 4th receiver module 81 " receives, send inner switching command to BSS93, in this inside switching command, carry and set up the local exchange of first terminal and the second terminal room speech channel and notify BSS93 to carry out the instruction of bypass operation.
After having described first terminal in the MSC that the present embodiment provides and carrying out switching in BSS93 can with same BSS93 in the second terminal realize the technical scheme of the Lawful Interception of monitoring system to terminal while setting up local exchange, the operation of switching, local exchange and bypass can be respectively in different message chronologically relation send, also can be to be incorporated in same message to send simultaneously, its concrete scheme is described described in the embodiment of the method that refers to above-mentioned Lawful Interception, does not repeat them here.
The MSC that the present embodiment provides, pass through bypass operation, from BSS, the speech channel of two terminal rooms is routed to MSC, thereby can realize and draw bypass from MSC and carry out Lawful Interception for monitoring system, the method can not cause the voice interruption in the speech channel of two terminal rooms having set up local exchange maybe can make the time of voice interruption greatly shorten, and makes listened person be not easy to perceive its speech channel monitored.
In addition, in embodiments of the present invention, also comprise the situation that can not meet local exchange condition after two kinds of terminals are switched.
Figure 11 is the structural representation of the present invention for the another embodiment of MSC of Lawful Interception.If will be switched to from BSS92 ' another BSS91 ' at the interior first terminal that carries out session and set up local exchange with the second terminal of BSS92 ', second terminal interior with residing in BSS92 ' is discontented with sufficient local exchange set up the condition, as shown in figure 11, this MSC8 included the first sending module 81, the first receiver module 82 and processing module 83, can also comprise: the first notification module 86 and the first speech channel link block 87 in comprising above-mentioned Fig. 8.Wherein the first notification module 86 is for notifying BSS92 ' releasing local exchange; The first speech channel link block 87 is for being connected to MSC8 by the first terminal after releasing local exchange and the speech channel of the second terminal room, to the speech channel of first terminal and the second terminal room is drawn for the Lawful Interception of carrying out speech channel.
By the first notification module and the first speech channel link block, can re-establish the speech channel of two terminals to MSC, make the speech channel of two terminals can be in MSC loopback, thereby if monitoring system need to be carried out Lawful Interception to terminal, can directly draw speech for Lawful Interception by MSC.
Figure 12 is the structural representation of the present invention for the another embodiment of MSC of Lawful Interception.To carry out after the interior switching of BSS93 ' at the interior first terminal that carries out session and set up local exchange with the second terminal of BSS93 ', be discontented with sufficient local exchange set up the condition with the second terminal that the BSS93 ' that coexists is interior, as shown in figure 12, this MSC8 included the first sending module 81, the first receiver module 82 and processing module 83, can also comprise in comprising above-mentioned Fig. 8: the second notification module 86 ' and the second speech channel link block 87 '.Wherein the second notification module 86 ' for notifying BSS93 ' releasing local exchange; The second speech channel link block 87 ' for the first terminal after releasing local exchange and the speech channel of the second terminal room are connected to MSC8, to the speech channel of first terminal and the second terminal room is drawn for the Lawful Interception of carrying out speech channel.
By the second notification module and the second speech channel link block, can re-establish the speech channel of two terminals to MSC, make the speech channel of two terminals can be in MSC loopback, thereby if monitoring system need to be carried out Lawful Interception to terminal, can directly draw speech for Lawful Interception by MSC.
Figure 13 is the structural representation of the system embodiment of Lawful Interception of the present invention.As shown in figure 13, this system comprises moving exchanging center MSC 1, base station sub-system BSS2 and monitoring system 3.Wherein, MSC1 in setting up the local exchange of first terminal and the second terminal room speech channel or set up in BSS2 after the local exchange of first terminal and the second terminal room speech channel in BSS2, and notice BSS2 output switches on MSC1; BSS2 is used for carrying out bypass operation, and output switches to MSC1, is routed on MSC1 with the speech channel that terminal room is set up; MSC1 is also for drawing speech to monitoring system 3 from the bypass being routed to MSC1; Monitoring system 3 is carried out the Lawful Interception to speech channel for the speech by drawing from MSC1.
The system of the Lawful Interception that the present embodiment provides, pass through bypass operation, from BSS, the speech channel of two terminal rooms is routed to MSC, thereby can realize and draw bypass from MSC and carry out Lawful Interception for monitoring system, the method can not cause the voice interruption in the speech channel of two terminal rooms having set up local exchange maybe can make the time of voice interruption greatly shorten, and makes listened person be not easy to perceive its speech channel monitored.
The technical scheme of the method and system of the Lawful Interception that the embodiment of the present invention provides can be applied in the communication systems such as global system for mobile communications (GSM), code division multiple address communication system (CDMA) or Wideband Code Division Multiple Access (WCDMA) communication system (WCDMA).
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, can carry out the hardware that instruction is relevant by computer program to complete, described program can be stored in a computer and can obtain in storage medium, this program, in the time carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (13)
1. a method for Lawful Interception, is characterized in that, comprising:
Set up the local exchange of first terminal and the second terminal room speech channel in base station sub-system BSS in or set up in BSS after the local exchange of first terminal and the second terminal room speech channel, notify described BSS output to switch on moving exchanging center MSC for the Lawful Interception of carrying out speech channel;
In the described local exchange of setting up first terminal and the second terminal room speech channel in BSS, notify described BSS output to switch to MSC and above for carrying out, the Lawful Interception of speech channel specifically comprised:
Described MSC sends the order of setting up the local exchange of first terminal and the second terminal room speech channel and the speech channel in described local exchange being carried out to bypass operation to described BSS;
Described MSC receive described BSS complete the foundation of described local exchange and by the speech channel output of setting up described local exchange switch to return after described MSC complete local exchange and bypass operation response message;
Described in described MSC receives, complete after local exchange and bypass operation response message, the bypass being routed on described MSC is drawn for the Lawful Interception of carrying out speech channel;
After the described local exchange of setting up first terminal and the second terminal room speech channel in BSS, notify described BSS output to switch to MSC and above for carrying out, the Lawful Interception of speech channel specifically comprised:
Described MSC sends the order of the local exchange of setting up first terminal and the second terminal room speech channel to described BSS;
Described MSC receive return after the foundation that described BSS completes described local exchange complete local exchange response message;
Described in described MSC receives, complete after local exchange response message, send the order of the speech channel execution bypass operation to setting up described local exchange to described BSS;
Described MSC receive described BSS by the speech channel output of setting up described local exchange switch to return after described MSC complete bypass operation response message;
Described in described MSC receives, complete bypass operation response message, the bypass being routed on described MSC is drawn for the Lawful Interception of carrying out speech channel.
2. the method for Lawful Interception according to claim 1, is characterized in that, described execution also comprises after the Lawful Interception of speech channel:
Described MSC sends and discharges bypass operation order to described BSS;
Described MSC receives described BSS and will be routed to the bypass Release complete returning after described bypass on described MSC discharges according to the order of described release bypass operation.
3. the method for Lawful Interception according to claim 1, it is characterized in that, after if described first terminal switches can with described BSS in the second terminal set up local exchange, in the described local exchange of setting up first terminal and the second terminal room speech channel in BSS or set up in BSS after the local exchange of first terminal and the second terminal room speech channel, notify described BSS output to switch to that MSC is upper specifically to be comprised the Lawful Interception of speech channel for carrying out:
After described first terminal switches, in described MSC sets up the local exchange of described first terminal and the second terminal room speech channel in described BSS, notify described BSS output to switch to the upper Lawful Interception for carrying out speech channel of described MSC; Or
In the process that described first terminal switches, in described MSC sets up the local exchange of described first terminal and the second terminal room speech channel in described BSS, notify described BSS output to switch to the upper Lawful Interception for carrying out speech channel of described MSC; Or
After described first terminal switches, first in described BSS, set up the local exchange of described first terminal and the second terminal room speech channel by described MSC, then notify described BSS output to switch to the upper Lawful Interception for carrying out speech channel of MSC by described MSC; Or
In the process that described first terminal switches, first in described BSS, set up the local exchange of described first terminal and the second terminal room speech channel by described MSC, then notify described BSS output to switch to the upper Lawful Interception for carrying out speech channel of MSC by described MSC.
4. the method for Lawful Interception according to claim 3, is characterized in that, the switching that described first terminal carries out comprises between BSS switches and the interior switching of BSS,
Between described BSS, switch to described first terminal is switched to described the second terminal place described BSS from another BSS;
In described BSS, switch to described first terminal and switch in described BSS, described first terminal and the second terminal are in same described BSS.
5. the method for Lawful Interception according to claim 4, it is characterized in that, in the time that described first terminal carries out switching between BSS, in the process that described first terminal switches, in described MSC sets up the local exchange of described first terminal and the second terminal room speech channel in described BSS, notify described BSS output to switch to described MSC and above for carrying out, the Lawful Interception of speech channel specifically comprised:
Described MSC receives after the handoff requirement message of described another BSS transmission, send handover request message to described BSS, in described handover request message, carry and set up the local exchange of first terminal and the second terminal room speech channel and notify described BSS to carry out the instruction of bypass operation;
Described MSC receives after the handover request ack message that described BSS returns, send switching command to described another BSS, in described handover request ack message, carry and set up the local exchange of first terminal and the second terminal room speech channel and notify described BSS to carry out the response of the instruction of bypass operation;
Described MSC receives the handoff completion message returning after the foundation of switching that described BSS completes described first terminal, local exchange and bypass operation, carries the result of setting up result and described bypass operation of described local exchange in described handoff completion message.
6. the method for Lawful Interception according to claim 4, it is characterized in that, while switching in described first terminal carries out BSS, in the process that described first terminal switches, in described MSC sets up the local exchange of described first terminal and the second terminal room speech channel in described BSS, notify described BSS output to switch to described MSC and above for carrying out, the Lawful Interception of speech channel specifically comprised:
Described MSC receives after the inside handover request message of described BSS transmission, send inner switching command to described BSS, in described inner switching command, carry and set up the local exchange of first terminal and the second terminal room speech channel and notify described BSS to carry out the instruction of bypass operation;
Described MSC receives the switching of returning after the foundation of switching that described BSS completes described first terminal, local exchange and dish dataway operation and completes response message, and described switching completes the result of setting up result and described bypass operation that carries described local exchange in response message.
7. the method for Lawful Interception according to claim 1, is characterized in that, if described first terminal after switching, do not meet with described BSS in the second terminal set up the condition of local exchange, also comprise:
Described MSC notifies described BSS to remove described local exchange;
Described MSC is connected to the described first terminal after the described local exchange of releasing and the speech channel of the second terminal room on described MSC.
8. the moving exchanging center MSC for Lawful Interception, it is characterized in that, described MSC, for set up the local exchange of first terminal and the second terminal room speech channel in base station sub-system BSS in or set up in BSS after the local exchange of first terminal and the second terminal room speech channel, notifies described BSS output to switch to the upper Lawful Interception for carrying out speech channel of described MSC;
Described MSC specifically comprises:
The first sending module, for sending the order of setting up the local exchange order of first terminal and the second terminal room speech channel and/or the speech channel of described local exchange being carried out to bypass operation to described BSS;
The first receiver module, completes the foundation of described local exchange and/or the speech channel output of setting up described local exchange is switched to corresponding the completing local exchange response message and/or complete bypass operation response message of returning after described MSC for receiving described BSS;
Processing module, for drawing the bypass being routed on described MSC for the Lawful Interception of carrying out speech channel.
9. the MSC for Lawful Interception according to claim 8, is characterized in that, described MSC also comprises:
The second sending module, for sending and discharge bypass operation order to described BSS;
The second receiver module, will be routed to the bypass Release complete returning after described bypass on described MSC discharges for receiving described BSS according to the order of described release bypass operation.
10. the MSC for Lawful Interception according to claim 8, is characterized in that, if when described first terminal is switched to described BSS from another BSS can with described BSS in the second terminal set up local exchange, described MSC specifically comprises:
The 3rd receiver module, the handoff requirement message sending for receiving described another BSS; Receive the handover request ack message that described BSS returns, in described handover request ack message, carry and set up the local exchange of first terminal and the second terminal room speech channel and notify described BSS to carry out the response of the instruction of bypass operation; Receive the handoff completion message returning after the foundation of switching that described BSS completes described first terminal, local exchange and bypass operation, in described handoff completion message, carry the result of setting up result and described bypass operation of described local exchange;
Select judge module, for selecting described first terminal will switch the Target cell entering from the cell list of described handoff requirement message, judge described Target cell and belong to described BSS and judge described first terminal and the second terminal room speech channel meets local exchange set up the condition, and determine whether described first terminal and the second terminal need to set up local exchange and bypass output;
The 3rd sending module, for sending handover request message to described BSS, carries in described handover request message and sets up the local exchange of first terminal and the second terminal room speech channel and notify described BSS to carry out the instruction of bypass operation; Send switching command to described another BSS.
11. MSC for Lawful Interception according to claim 8, is characterized in that, if when described first terminal switches in the BSS at described the second terminal place can with described BSS in the second terminal set up local exchange, described MSC specifically comprises:
The 4th receiver module, the inside handover request message sending for receiving described BSS; Receive the switching of returning after the foundation of switching that described BSS completes described first terminal, local exchange and bypass operation and complete response message, described switching completes the result of setting up result and described bypass operation that carries described local exchange in response message;
The 4th sending module, for receiving after the described inner handover request message that described the 4th receiver module receives, send inner switching command to described BSS, in described inner switching command, carry and set up the local exchange of first terminal and the second terminal room speech channel and notify described BSS to carry out the instruction of bypass operation.
12. MSC for Lawful Interception according to claim 8, is characterized in that, if described first terminal after switching, do not meet with described BSS in the second terminal set up the condition of local exchange, described MSC also comprises:
Notification module, for notifying described BSS to remove described local exchange;
Speech channel link block, for being connected to described MSC by the described first terminal after the described local exchange of releasing and the speech channel of the second terminal room.
The system of 13. 1 kinds of Lawful Interceptions, is characterized in that, comprising: moving exchanging center MSC, base station sub-system BSS and monitoring system, wherein
Described MSC, for set up the local exchange of first terminal and the second terminal room speech channel in base station sub-system BSS in or set up in BSS after the local exchange of first terminal and the second terminal room speech channel, notifies described BSS output to switch on MSC;
Described BSS, for carrying out bypass operation, output switches to described MSC, is routed on described MSC with the speech channel that described terminal room is set up;
Described MSC is also for drawing speech to described monitoring system from the bypass being routed to described MSC;
Described monitoring system, carries out the Lawful Interception to speech channel for the speech by drawing from described MSC;
Described MSC specifically comprises:
The first sending module, for sending the order of setting up the local exchange order of first terminal and the second terminal room speech channel and/or the speech channel of described local exchange being carried out to bypass operation to described BSS;
The first receiver module, completes the foundation of described local exchange and/or the speech channel output of setting up described local exchange is switched to corresponding the completing local exchange response message and/or complete bypass operation response message of returning after described MSC for receiving described BSS;
Processing module, for drawing the bypass being routed on described MSC for the Lawful Interception of carrying out speech channel.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2009/071166 WO2010111843A1 (en) | 2009-04-03 | 2009-04-03 | Method, system and mobile switch center for legal listening |
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| Publication Number | Publication Date |
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| CN102405662A CN102405662A (en) | 2012-04-04 |
| CN102405662B true CN102405662B (en) | 2014-06-11 |
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| CN200980117319.XA Expired - Fee Related CN102405662B (en) | 2009-04-03 | 2009-04-03 | Method, system and mobile switch center for legal listening |
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| Country | Link |
|---|---|
| EP (1) | EP2426967A4 (en) |
| CN (1) | CN102405662B (en) |
| WO (1) | WO2010111843A1 (en) |
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| CN104080132B (en) * | 2013-03-25 | 2018-06-19 | 中国移动通信集团公司 | A kind of data processing method and equipment |
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| CN1691675A (en) * | 2004-04-20 | 2005-11-02 | 华为技术有限公司 | A method for automatically reporting target user equipment location information |
| CN1802005A (en) * | 2005-01-07 | 2006-07-12 | 华为技术有限公司 | Mobile network networking method |
| EP1701503A1 (en) * | 2005-03-07 | 2006-09-13 | Alcatel Alsthom Compagnie Generale D'electricite | Lawful interception in IP networks |
| CN101141816A (en) * | 2007-10-08 | 2008-03-12 | 中兴通讯股份有限公司 | Method of master control MSC to obtain mobile terminal position of service MSC |
| CN101350742A (en) * | 2007-07-20 | 2009-01-21 | 中兴通讯股份有限公司 | Method and system for implementing voice listen of next generation network |
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| CN100456874C (en) * | 2004-03-24 | 2009-01-28 | 华为技术有限公司 | Method for realizing call of fast group calling |
| CN100433898C (en) * | 2004-12-31 | 2008-11-12 | 华为技术有限公司 | Group call channel resource managing method in mobile communication system |
| EP1883195A1 (en) * | 2006-07-28 | 2008-01-30 | Nokia Siemens Networks Gmbh & Co. Kg | Tunnel switching mechanism inside a SGSN for OTA (one tunnel approach) - TTA (Two tunnel approach) switching used for legal interception |
-
2009
- 2009-04-03 EP EP09842500A patent/EP2426967A4/en not_active Withdrawn
- 2009-04-03 CN CN200980117319.XA patent/CN102405662B/en not_active Expired - Fee Related
- 2009-04-03 WO PCT/CN2009/071166 patent/WO2010111843A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1691675A (en) * | 2004-04-20 | 2005-11-02 | 华为技术有限公司 | A method for automatically reporting target user equipment location information |
| CN1802005A (en) * | 2005-01-07 | 2006-07-12 | 华为技术有限公司 | Mobile network networking method |
| EP1701503A1 (en) * | 2005-03-07 | 2006-09-13 | Alcatel Alsthom Compagnie Generale D'electricite | Lawful interception in IP networks |
| CN101350742A (en) * | 2007-07-20 | 2009-01-21 | 中兴通讯股份有限公司 | Method and system for implementing voice listen of next generation network |
| CN101141816A (en) * | 2007-10-08 | 2008-03-12 | 中兴通讯股份有限公司 | Method of master control MSC to obtain mobile terminal position of service MSC |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010111843A1 (en) | 2010-10-07 |
| EP2426967A1 (en) | 2012-03-07 |
| EP2426967A4 (en) | 2012-03-07 |
| CN102405662A (en) | 2012-04-04 |
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